Quote:
The OP got about 250fps increase from his carbine, over the listed velocity for the load. That's a bit more than 20-40fps...
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The vast majority of the velocity is gained in the first 8" of barrel. For anything past that you gaining very little.
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Retired Law Enforcement
U. S. Army Veteran
Armorer
My rifle and pistol are tools, I am the weapon.
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